Twitching that is widespread over time without muscle weakness and wasting is very unlikely to be ALS. Tongue twitching does occur in ALS with tongue wasting but this is just one very uncommon cause of twitching. Other common causes include benign fasciculation syndrome, an overactive thyroid gland, pinched nerves, spinal cord problems, or even just exercise/cold in certain people.
You should be seen by a Movement disorders neurologist -- ask them about myoclonus dystonia syndrome or any other that may present w/ similar symptoms.
However, if these are not causing any major disruptions in your life and are not progressive, I would not worry about it so much. There are a lot of benign symptoms that we all have every now and then.
Good luck
ON